transcription, транскрипция: [ i-ˈlek-ˌträn ]
noun
Etymology: electr- + -on (II)
Date: 1891
: an elementary particle consisting of a charge of negative electricity equal to about 1.602 × 10 -19 coulomb and having a mass when at rest of about 9.109 × 10 -31 kilogram or about 1/1836 that of a proton